It all started when I was very young. For some reason, I was sure there was a land in the Atlantic Ocean called Atlantis. I can remember my mother telling me I was wrong and finally showing me on a map that there was no such place. From that experience I learned to stop talking about it, but I didn't forget it. When I had time, I focused on prehistory and soon became convinced that devastating floods, earthquakes, volcanic eruptions, Ice Ages, comets, and asteroids destroyed advanced civilizations in the past. Archaeologists today are beginning to recognize that in prehistory, brave people sailed across the Atlantic and Pacific Oceans. Between 50,000 and 10,000 BC, when an immense amount ...